We are a few in France to have this desk : Lafont Audio Labs Producer Series and was wondering if someone in other country has this desk...Always had nice help here with my Matchless :) But finally sold it to a good friend, so his turn to work on it !I have some questions about OPamps, because I can see I have not the same on each strip.... I think they have been partially replaced but I can find TL072 on some strips, whereas it's NE5532 on others....Can someone tell me what's the good thing to put in replacement ? for inputs, outputs...The original schematics show NE5532 x2 ou outputs, whereas I have only one TL072 or 5532... I can send pictures to show you my problem.The fact is that my schematics were given to me by the manufacturer, but are not specific to my desk... each producer was a bit different, made by hand at order...

Ok, as there are 38 strips in TL072 and only 2 in NE5532, I decided to put TL072 on 40 strips (Colin told me, if it works like this, keep it like this). For now, I'll keep it like this and see !

However, new question : I have a noise from the desk, all strips send the same noise to the computer throught the 24 buses.The noise looks like a Whistling at high frequencies, not regular, comes and goes away....Did not have it few days ago during my first tests.....As I have it on every strip, I was thinking it was a PSU issue or just interferences..Any idea ?I can maybe rec the noise if needed ;)THanks

EDIT : as it can be anything, I'll first finish to recap the whole desk and see then, thanks !